It was Nicholas Copernicus.
who discovered that the sun keeps the planets one Their orbit.
I think this is called the Heliocentric Theory and was first discovered by Copernicus.
Gravitational attraction to the sun
Gravitational attraction is proportional to mass.
The gravitational attraction from our Sun holds the planets in orbit.
None.
By accretion, through gravitational attraction and collision.
because of gravitational force of attraction between the earth and other planets
That force is called gravity.
Ptolemey is a scientist that studied the planets and he discovered new planets in place.
The Sun`s gravity holds all the planets in orbit in space.The gravitational attraction from our Sun.
Actually, the planets are all constantly moving. They have a gravitational attraction to each other, though.
The gravitational attraction by the Sun.